I myself am in a fraternity. The Holy Fraternal Order of the Knights of Columbus
Theres nothing sinister like that in fraternities. Not in ours at least.

I myself am a 3rd Degree so I can attest to that.
Us Knights do take Oaths. The first is an Oath of Secrecy. This is only to ensure that the following ceremonies remain impactful and that they will still hold meaning to new members coming in. In other words, to keep it interesting for the newbies.
It is my understanding that most college fraternities and sororities do so as well for the self-same reasons. The wearing of robes is usually done to make the ceremony/initiation memorable. To have such an oddity associated with a ceremony would certainly make it stay in your mind. This is usually done to really drive home the message or prinicples being taught by the fraternity or sorority. Again, nothing sinister. Secret mottos are sometimes held likewise. Just to have a fancy-schmancy thing to call their own. And occasionally there may be some principle associated with it. To drive home the message, but nothing bad. Handshakes are usually just for novelty. Rarely is there anything even associated with them.
Secret creeds or recitations at meetings would be a red flag. Us Knights in our meetings we just say the pledge, an opening prayer or two and have the meeting. a closing prayer at the end and then everyone goes home.
But if there are any bad things like you are afraid of, I wouldnt join. Especially if there is convincing evidence of such things.
If you want, why not join the Knights? We have college Councils set up at many campuses. If yours doesnt have one, go to the nearest. OR go to the regular Council at your Church. They’d love to have new members.
