Why do you care about the opinions of strangers on the 'net? If someone would stop talking to you because of your looks, you don't want to talk to them anyway.
No need for confusion. They're just weirdos. There are many, many weirdos on the internet. They do not always have logical reasons for their behavior.
Because usually people online mostly go after the looks.. And you should have good self-confidence without anyone needing to comment about your look.. you must know deep within that you're a sexy lady! :D
How can anyone have an opinion on how you look? you have no pictures posted...