Beggars
You should better ignore beggars in Bucharest who often act aggressively. If you start talking to them it will be difficult to get rid of those fequently obtrusive poeple. Old people who helplessly beg with their hats without causing you any inconvenience, however, really deserve support. Their pension is often not enough to survive. They are often too old to work and thus die from hunger. They are even happy about the smallest donation.
Taking photographs/filming
You should especially take care when taking pictures of bridges, aerodromes and military institutions because in front of which often prohibition signs can be found. Roma people, however, do not "wear" signs but you still should not take pictures of them because some of them believe that a photograph would steal their souls.
Banks and credit cards
Banks are opended on weekdays from 8 a.m. - 1 p.m. and from 2 p.m. - 6 p.m., you can also cash traveller cheques here. The exchange of money is, however, frequently cheaper in bigger hotels or private exchange offices. Do not exchange money in the streets, this almost always has to do with fraud.