Would never give clothes to those "charities" that drop the bags in through the letter box, don't know what half of them are up to, always give the old clothes directly to Oxfam in Dundalk myself.
Those ones selling the "charity" scratch cards. No way I would ever buy one of them, in most instances the charity only receives between 5% and 10% of the proceeds!!!! I have become that cynical that I will only donate to certain charities and normally do it directly.