An anonymous poster who does not reveal anything about who she is or where she works can't reasonably be considered to be advertising herself.
I wish there were more anonymous SP's and MPA's around here just to chat. Whenever I read a non-anonymous SP's posts I always interpret it as at least an indirect advertisement for her services. With the exception of MinnieApple, who just hates customers in general.
Really if an SP writes, "blah blah blah i love sex so much blah blah blah i always orgasm blah blah blah" who doesn't know she threw those comments in there to paint a public image of herself that helps her business? On the other hand if she's completely anonymous it can't be about business, can it?
Unless of course PK is doing a healthy business via PM's... are you PK? In that case you probably ought to tone it down.