Londondrz, I would like to add my voice to those praising your actions.
As someone who sits somewhere between the tut tut brigade or always making a stand I think its people like you that make a massive difference. When lots of people decide to do nothing it can be daunting standing up against what we all know is wrong but I find what you have said very inspirational. Littering is (99.99% of the time) an avoidable and lazy choice rather than being due to a lack of suitable disposal facilities and it shouldn't ever be seen as being socially acceptable if people actually take pride in where they live.
I could fill way more than the character allowance on this forum ranting on smokers discarding their butts which seems to not be considered litter, post smoking ban.