I do not think that being kind and sincere will give you a bad
impression. On the contrary it will give people a good impression.
However amongst that group of people that u left a good impression
on, some would feel that it would be taken advantaged of in a
realistic setting. In other words they feel that your qualities
whilst nothing wrong is too idealistic and detrimental to your well
being in a realistic setting. These people are in fact trying to
help you.
I thank you for correcting my point on the situation. It's
really sad, especially when one can get conned easliy (take my
female classmate, SV for example, when I had to tell her I was
lying)... Even with those people trying to help them, we can't stop
the issues that others have with the victim, such as remarks,
teasing and bullying the victim, easily...