Sat Nam, all- I am hoping things are well and good for everyone!
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/sikh-youth/5724-call-muslims-seduce-sikh-girls-into.html
Yes, to get back to the main topic- yes, it does happen. "Muslim" guys manage, through trickery or other oftenly forceful coersion take Sikh girls to wife, and not for what we would call spiritual reasons, but for cultural and political ones. Indeed, it is true, a real Muslim would not wish to do that, any more than a real Sikh would wish to do something similar. So, having said that, the next point of conversation might be a discussion on how to stop it. One of the first things that comes to mind is to make sure our children truly understand the gifts the Gurus have given us, and the sacrifices they made for us and for everyone to live a happier life, whether Sikh or non-Sikh. So that would naturally mean that education is the order of the day! It might be a good thing for parents and teachers to warn these girls of the dangers of not thoroughly checking out the background of some man before the girl has any sort of friendship with him, no matter what his professed religion may be- these days, one cannot be too careful! Who is he? Who are his parents? What do they do- where do they work, and whom for? If he says he is a Muslim, well, then that would certainly beg the question as to why he seems interested in a Sikh girl! Why wouldn't he be interested in a Muslim girl? Girls need to be made to understand what they would be giving up were they to marry into a Muslim family- how is one to correlate living the Sikh Way, attending Gurdwara, and everything that goes into the life of a Sikh, and Sharia? Let's start thinking of creative ways to prevent the problem from getting worse.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=5724
Cheers,
Kulwant