I'm not quite sure why people are so deeply angry with Erin.
Yes, she did lead Rob on in FLOM1. Whether she truly didn't realize that he had such a deep attraction to her or whether she was playing both him and Paige I can't say. If she truly didn't know how "smitten" he was with her, then she's not so good at reading signals.
When I watched the last show of FLOM1 (and that was the only one in that series that I watched), it was clear from Rob's body language that he was more drawn to Erin, so I was surprised when she told Paige that she was sure he would pick Paige. But she also hadn't been on Paige's dates, so she really had no basis for comparison.
That said, I was really quite impressed tonight by the fact that she DIDN'T seem to be "playing" all of the guys. She was much more physcially affectionate/intimate with Chad than she was with either Wade or Rob. She didn't kiss Rob that I saw, and she only gave Wade a little perfunctory peck--while she and Chad were all over each other. Wade seemed to get a pretty clear message that the passion wasn't there for her.
Yes, she probably misled Rob in FLOM1, I certainly haven't forgotten the "nice girls finish rich" quote that they kept playing. But if you think about it, Rob was sucking face with all of the finalists, and they were comparing notes. Based on what he was doing in terms of expressing physical affection, how could she know for sure that he liked her any more than Paige or Kelly.
Erin has given the men much more clear signals about where they stand with her in terms of her romantic feelings than Rob did with the women. Didn't he make out in the hot tub with Kelly, on the floor with Erin, and I forget where with Paige (oh, I guess I saw the last two episodes ).
Maybe if Rob had been a bit less of an equal-opportunity-maker-outer, Erin would have had a more clear message that she was the front runner, and then we'd know for sure that she was cold-heartedly playing Rob rather than just kissing someone who was apparently a decent kisser (from what she told Paige that last day) and seemed to be kissing everyone.
I have no idea what her motives are--other than to extend her 15 minutes, but I'm having a hard time identifying with the intense anger towards her. She's been way less of a player than Rob was with the women.
That's my two cents (well actually probably a couple of dollars worth). (I have no idea what this image means, but I thought it was cute. Hope it's not something rude.)