Just ignore the one liner's and move on with your day. Unfortunately, it's just a part of this business. If they were serious about seeing you, they would introduce themselves and be respectful.
When a guy takes the time, like 1 to minutes--lol, it makes a long lasting impression and he will always come first and the guy that sends the, "you avail" gets deleted.
I suppose, in the eyes of many, we ARE call girls, so maybe that means we should be available to whomever, however, whenever, but we can't all be painted with that same brush.
Frankly, if he can't take the time to communicate what he wants and introduce himself, briefly, he probably isn't someone you want to take a date with anyway.
Visa Versa- Some ladies aren't too good at hobby communication either!