There are real time wasters on here alright but I think many are not.
The problem is they are cock driven. Being horny they genuinely want to meet and make a plan. But when the horn goes they have second thoughts. This applies to both parties.
Rather than freezing your arse off giving him "another ten minutes". I find it best to agree to confirm any meeting next day and give the option of a "no fault" cancellation. I may miss a few good fucks but I think it's worth it.
Real meets "at the drop of a knickers" may work sometimes but how often?
The problem is that if you no longer want to meet, just say so.
I rarely have to cancel things, but the few times I have to.. I make sure they know, no one wants their time and effort wasted.