I can't help but notice that your avatar is on the 'Symbole Zła' warning poster.
I noticed that too. It's the Eye of Horus: Check it out and decide for yourself if it's a 'symbol zła'. I just use it because I like it. :-)
I noticed they also consider the Yin/Yang to be a symbol of evil, which would come as a surprise to most people from China.
About sects in PL, there certainly are some. I suspect more so in the provinces that in Warsaw, and surely not in Zakopane.
Scientology has a presence but is largely underground - they do discreet voluntary work but don't actively recruit, and aren't allowed to by law. Hare Krishna are quite big in Warsaw, and have been around since the mid-80s. Bahai (sect or not is another matter) has a presence, especially in the provinces. The 'Great White Brotherhood' (the ones that were stockpiling petrol ready for the end of society then got fined a fortune when it leaked out of the underground tanks) have a small presence here, and Osho (the ones that deliberately poisoned hundreds of people in the US with salmonella) are well established and sell a lot of their founder's books.
One (smallish) language school here in Warsaw is very closely connected to a well known sect, but thankfully they don't try to recruit their native speakers. Many if not all of the Poles working there come from within the membership though, and I suspect their students get the soft sell. One of their corporate clients switched to me because the soft sell had become a little less soft.