Hi,
I dont have any personal expernices with the agents, but I wouldnt think it would be discriminating to say that most agents are crooks..pretty sure the opinions of the people who had dealt will them will fall in pretty soon..

There are plenty of brown people studying at Warsaw...and there is quite a few immigrants from that part of the world...I can probably mention 4 or 5 indian restaurants with good food..some of them are little more expensive then ur regular food joint...and there are shops that specialise in selling the spices, pickles an what not..

Xenophobia is widespread in Poland, they have been invaded by basically every country around them...so I guess it kinda left some scars...its not directed against colored people, but just some kinda misstrust. Its usually more noticeable among the older generations..the younger generations are usually much better. And ofcourse the situation is better in the larger cities with alot of visitors...such as Warsaw, Krakow and Gdansk (the 3 cities which I have visited and think they have lesser degree of xenophobia).
But as far as I know...for about the 3 years I been there..I havent heard of any indians getting beaten up or anything like that..