For example, taken from a post to Mac ----Peripherals made a few minutes ago:
<span style="color: rgb(66, 66, 68); font-family: Helvetica, Arial, sans-serif; font-size: 12px; ">
"My text<font color="#424244" face="Helvetica, Arial, sans-serif"><span style="font-size: 12px;"> </font><font color="#424244" face="Helvetica, Arial, sans-serif"><span style="font-size: 12px;"><span style="border-collapse: collapse; color: rgb(51, 51, 51); font-family: 'Lucida Grande', 'Lucida Sans Unicode', Helvetica, Arial, Verdana, sans-serif; ">More my text."</font>
<span style="color: rgb(66, 66, 68); font-family: Helvetica, Arial, sans-serif; font-size: 12px; ">
<span style="color: rgb(66, 66, 68); font-family: Helvetica, Arial, sans-serif; font-size: 12px; ">It appears in several other peoples' posts as well, and makes a post more difficult to read.
<span style="color: rgb(66, 66, 68); font-family: Helvetica, Arial, sans-serif; font-size: 12px; ">
<span style="color: rgb(66, 66, 68); font-family: Helvetica, Arial, sans-serif; font-size: 12px; ">and when I Preview this post, more HTML is added to it!

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