That sort of thing used to piss me off, but I realised there is no point in even thinking about it.
Part of my screening process when deciding to see a new lady, along with checking for reviews on UKP and elsewhere, is her ability to communicate properly. If she ignores or deleted emails without reading them, or replies to an attempted phone call with "please txt me hun" then she is off my HL straight away.
I suppose this might mean that I miss out on a potentially good punt on extremely rare occasions, but there is no shortage of prossies these days (although maybe a shortage of good ones locally at the moment) and I can't be arsed to waste my time.