This subject certainly polarises people! Have read all the comments re imbeciles, kneeing the seat in front, the right to what you wish etc., but I think it still comes down to the same point. The airline is providing the recline as part of the product you paid for, so any logical-thinking pax would consider they can use it, unless advised otherwise by cabin crew. If certain pax do not like the pax in front reclining, then they should direct their complaint to the airline, and try and find one that doesn’t offer recline. During meal service it is reasonable to ask and expect pax to have their seat upright (and under these circumstances I won’t cop big recline). If it’s difficult to get out of your seat, then if on the aisle (at least on 747 and 767), the aisle armrest can be raised making ingress/egress simple. Though it does remain a problem from middle/window seats.
It’s just so plain illogical to get shirty at people for using their recline, provided to them as part of the product they have paid for (though I would make an exception for mealtimes). And for the record, I sometimes recline, but never to any great degree and never during mealtimes. And I can handle the pax in front reclining fully, except during mealtimes.
Cheers