Re: One of these days...
It's not as simple as put it out and hope it disappear.
Legally, *you* are responsible for disposing of stuff properly. So no - leaving it out on the kerb is not viable.
I suppose one solution is to put things out with a 'please ask to take' note. Once they've asked it's a proper transaction; 'sold (for free) as seen'.
If it's on your property, possibly (subject to WEEE regulations and hazardous waste/HSE regs - so not putting out old electronics or stuff with lithium batteries in). If you dump it on public property (ie the road or kerb) then no since that's a breach of the regulations.