There were a half dozen anti-primate-testing protestors on the street in front of the hotel on the street as I walked in. However, the hotel is recessed so that if you're walking--or even driving--in, you would be approaching the hotel from either side of the block, and thus from behind them. I only saw them because I bussed in this morning, which took me past them. However, I'm assuming they're here for the conference today because A: there's someone presenting primate-based research today, and B: why else would they be in front of the hotel?
So considering that attendees of the conference are unlikely to notice them, and no one else even knows that this thing is going on, whose attention exactly are they attempting to grab?