Its happening more then you think, we are falling back into the fold of hinduisim. Things like exclusion (eating only from a fellow amritdhari), shaking weapons, or even believing that hindu gods existed are the tell tale signs of exactly that: dissolution.
Ritiulism is running rampant in our communities from our mothers doing/saying wierd stuff like don't sneeze before you leave the home to Sikh youth believing that Gurbani can only be read by an amrithdari Sikh, or only Sikhs can attain salvation. Sikhs today believe that they should only be friends with fellow Sikhs, and that no matter how much better a person that non-sikh maybe then the amritdharis it is still jhoot to keep his/her sangat.
We have taken way to many strides backwards, we believe seva is at the gurdwara: NO NOT ANYMORE. Seva of the guru is by helping the poor on our streets, not by doing meaningless langars/akhand paths. Unless ofcourse you are listeniing to the whole akhand path, becuase the walls are not going to benifit from it.