I don't rant, I just send a polite email requesting an introduction and confirmation they wish to go ahead.
They either reply, or they don't, this seems to prevent escalation and accusations of rudeness.
Doesn't mean it's annoying if you've explained this clearly in your profile. Also be aware that the mobile app doesn't automatically open up the main body of your profile - only your summary and contact details, so this can often go unread for this reason.
The way AW is laid out does to some people make it look like that is how to make a booking, on the other side the amount of guys who don't understand you do need to submit a form to leave feedback is also fairly high so I can understand how misleading the whole thing can be. A fair few have emailed me after the booking to ask why I've not left them feedback, often as if I've not bothered. I reply explaining it can only be left if the booking system is used. If someone asks me before the booking I'll then advise on submitting a form.