Honestly Thrall, in my opinion you should do the same precautions wiht anyone you meet for the first time, especially on line, be them male/female, Dom or sub.
That being said... do I? ummmmmmmm... no. Just becasue it doesn't cross my mind too.
Also, the Doms/men should be taking the EXACT same precautions. I may be a female but that doesn't mean I can't still drug them without their knowledge, lure them somewhere, etc. I could follow them from the restaurant, etc. Heck my "safe" call could even be finalizing details of having help in doing them in. How are they to know or stay safe?
It only makes sense. Now if the big bad Doms didn't think they were invincible most of the time and do it is an entirely different challenge.... *laughs*