They happen to drop their brushes, as soon as you pick up and give them; the trick starts.
Try to avoid please.
These guys are like to chat and offers you to show around.
However, their goals to take you to stores they work for and sell overpriced cheap products.
Unfortunately, taxi drivers can be very tricky in Istanbul.
Again, there is no safety issue, but ask reception the approximate prices.
Beggars are not poor! It is their job.
Avoid those who are pretend to be eating from the garbage bins or begging in front of mosques.