Unfortunately (and please read this as just one girl's opinion) the attitudes of most guys when it comes to transwomen (or for that matter, about sex in general) are heavily influenced by porn tropes, and the dominant trope for most porn that includes transwomen (especially those somewhere between long-time HRT and GRS) tends to portray us as willing meat. It doesn't have much to do with my own experience or sense of self, but in that it's not all that different from the conventions and distortions that exist in most of the porn industry. With greater openness and communication there have been some exceptions to this in recent years, but I wouldn't expect many men would have seen these... they're hard enough to find if you're in the relatively small market of transwomen, looking for something that speaks to our experience.
I wouldn't recommend acting dumb, if you aren't dumb. You'll be more likely to encourage the kind of guy it seems you'd rather avoid wasting time on, and ultimately lose even more time in pointless encounters that have little hope of being emotionally or sexually fulfilling. Ditto most of what Catherine already said.
