AlvinofDiaspar
Moderator
I find no problems saying "no" to them, without the least tinge of regret or hesitation. This may be a bit of arm-chair psychoanalysis, but I used to find myself bothered by them because I felt guilty for not contributing, and I felt like a sucker for letting them waste my time with an unnecessary guilt trip that I did not have the guts or presence to get out of. My solution now is to walk confidently, initiate eye contact (they're often fishing for push-overs, I feel), respond to their "Hello!" and when they ask whether I've got time to chat, I simply say "No thanks, I'm in a hurry." A bit of sidewalk dominant behavior has saved me an endless amount of grief and now the experience is quite inoffensive, for me.
Put on the headphones, walk briskly, either look at your phone or smile but ignore. They'd go for easier targets in a hurry.
AoD