At first, I had a negative view towards lolicon, but then after playing several VN, I realized that I myself enjoy loli. If the character themselves is underage, if different, but if they just look the part, then I'm all for it. I don't mainly focus on it, but I appreciate a good loli every now and again. I thing the negative connotation is mainly from the misunderstanding that all lolicons are pedophiles. While some certainly are, I think most realize that what happens on a computer screen is much different than what should happen in real life.
IMHO, there's worse preferences that lolicon.