You will gain no respect or kudos for it, only be seen as an easy mark and a soft touch.
this is an excellent point, unfortunately many westerners see themselves as the big 'I am' and feel they are really helping and being appreciated, however, as you say, the opposite is often true.
i remember one ex-gf telling me after she was married that her husband had paid 2.4 million baht dowry and that all her family, and ever she herself, thought he was an idiot who didn;t understand thailand or thai culture. as a uni graduate with a decent office job she said the family would have accepted 200,000 baht