yes. they are disabled by default in tinymce but it's just a flag to turn on/off. here is an example of the type of output some users generate:
<strong><em><font face="georgia,palatino" color="#00cc00" size="3" /></em></strong>
<strong><em><font face="georgia,palatino" color="#00cc00" size="3" /></em></strong>
<a href="http://imageshack.us"><strong><em><font face="georgia,palatino" color="#00cc00" size="3"><img alt="Image Hosted by ImageShack.us" src="http://img148.imageshack.us/img148/7162/101006008si6.png" border="0" /></font></em></strong></a><strong><em><font face="georgia,palatino" color="#00cc00" size="3"> </font></em></strong>
<strong><em><font face="georgia,palatino" color="#00cc00" size="3">C'est comme...si le printemps revenait.</font></em></strong>
<strong><em><font face="georgia,palatino" color="#00cc00" size="3">J'ai pris ces photos il y a quelques minutes, la nature nous offre ses dernières fleurettes:</font></em></strong>
<strong><em><font face="georgia,palatino" color="#00cc00" size="3">Fleurs de néfliers:</font></em></strong>
<a href="http://imageshack.us"><strong><em><font face="georgia,palatino" color="#00cc00" size="3"><img alt="Image Hosted by ImageShack.us" src="http://img152.imageshack.us/img152/1338/101006003bd0.jpg" border="0" /></font></em></strong></a>
<strong><em><font face="georgia,palatino" color="#00cc00" size="3">le figuier fait de nouvelles pousses.</font></em></strong>
<a href="http://imageshack.us"><strong><em><font face="georgia,palatino" color="#00cc00" size="3"><img alt="Image Hosted by ImageShack.us" src="http://img154.imageshack.us/img154/939/101006004uo7.jpg" border="0" /></font></em></strong></a><strong><em><font face="georgia,palatino" color="#00cc00" size="3"> </font></em></strong>
<a href="http://imageshack.us"><strong><em><font face="georgia,palatino" color="#00cc00" size="3"><img alt="Image Hosted by ImageShack.us" src="http://img218.imageshack.us/img218/9737/101006012tr9.jpg" border="0" /></font></em></strong></a>
<strong><em><font face="georgia,palatino" color="#00cc00" size="3" /></em></strong>
<strong><em><font face="georgia,palatino" color="#00cc00" size="3">Petit souci....</font></em></strong>
<a href="http://www.casimages.com/toolbar.php"><strong><em><font face="georgia,palatino" color="#00cc00" size="3"><img alt="Image hébergée par Casimages.com : votre hébergeur d images simple et gratuit" src="http://www.casimages.com/img/061010030354145734.jpg" border="0" /> </font></em></strong>
<strong><em><font face="georgia,palatino" color="#00cc00" size="3" /></em></strong>
</a><a href="http://www.casimages.com/toolbar.php"><strong><em><font face="georgia,palatino" color="#00cc00" size="3"><img alt="Image hébergée par Casimages.com : votre hébergeur d images simple et gratuit" src="http://www.casimages.com/img/061010030442145737.jpg" border="0" /> </font></em></strong>
<strong><em><font face="georgia,palatino" color="#00cc00" size="3" /></em></strong>
</a><a href="http://www.casimages.com/toolbar.php"><strong><em><font face="georgia,palatino" color="#00cc00" size="3" /></em></strong>
<a href="http://www.casimages.com/toolbar.php"><strong><em><font face="georgia,palatino" color="#00cc00" size="3"><img alt="Image hébergée par Casimages.com : votre hébergeur d images simple et gratuit" src="http://www.casimages.com/img/061010030516145739.jpg" border="0" /></font></em></strong></a>
</a><strong><em><font face="georgia,palatino" color="#00cc00" size="3" /></em></strong>
<strong><em><font face="georgia,palatino" color="#00cc00" size="3">ce sont des fleurs d'arbousiers, a droite vous pouvez apercevoir le fruit qui rougira avant de mûrir.</font></em></strong>
<strong><em><font face="georgia,palatino" color="#00cc00" size="3" /></em></strong>
<a href="http://www.casimages.com/toolbar.php"><strong><em><font face="georgia,palatino" color="#00cc00" size="3"><img alt="Image hébergée par Casimages.com : votre hébergeur d images simple et gratuit" src="http://www.casimages.com/img/061010030631145743.jpg" border="0" /></font></em></strong></a>
Note the <font face="georgia,palatino" color="#00cc00" size="3" />
No questions why their blogs get messed up...