Dating Online Explosion

I just set a date with guy I met online yesterday. It`s pretty much a blind date, he doesn`t know what I look like,but he has a picture in his profile. However it too small to see what he really looks like. He is a biker and he has bad spelling. I know this doesn`t mean he is a bad man, but it oesn`t look right to me. I am meeting this man, because I am sick of cowards online who can exchange messages online,but never actually meet. I have this strange feeling I won`t like this man and I need your advice what to do if I don`t like him, what to tell him afterwards.
He agreed to meet during the day and it is going to be in a public place, but I still have this strange feeling. This is my 3rd blind date with the people I met online, but I have a strange feeling about this one, he is also much older than I, maybe that`s the reason. Please, don`t make nasty< comments if you don`t have to.

Joe