Those recycling bins are awesome, you certainly can not miss those bright colours! And I think you are right with tagged for those stickers, often it seems to me more an advertising campaign as it revolves around brands although there are some unique looking images on that emergency phone.
That hydrant is amazing in black and white, it always fascinates me seeing those - do you think it was purposely being drained?
Thanks for confirming it is tagging, some were advertising as you say, some for bands and such and some that to me just seem random
I honestly have no idea about the hydrant, but normally if done for a check the firefighter is nearby, so nit sure in this case