Because not everybody is as open minded as you.  I get flamed all the time even if I'm not quoting the Bible to people.  One guy at my college saw me sitting by myself reading my Bible and came up to me and started telling me how stupid and naieve I was.  There I was minding my own business and he comes up and starts shouting at me for like, five minutes.  So I'm cautious now as you can see.  I also get non-christians coming onto my blog telling me how idiotic I am etc etc.  As a Christian I love to talk about God and people get angry because they don't.  I'm fine with them not wanting to hear about it and then I don't talk to specific people about it, but that doesn't stop random people from hating on me over it.  Just didn't want any flames here was all.  This P and S community is wonderful and I didn't want to see flames from it.