I feel like workplace relationships is so unprofessional for an organization. 
Really? In what ways do you feel they are unprofessional?
It comes with a lot if the couple is going through personal feelings, affections with the other person it effects the staff as a whole.
I agree with public displays of affection. In a professional environment I wouldn't want to have to deal with it either. Is it a big problem where you work?
Not in my current job thanks for that but in my previous job yes and it was a manager and a team member and once they started dating the worker's ability to work went down.
Oh wow, I can see how a manager dating a peer could be troublesome. In many jobs I've had this was not allowed, although peer to peer relationships were acceptable. 
Now the friendship yes that is different but over time if it gets out of hand and emotions develop then theirs your problem and in most jobs it is not acceptable but it still doesn't stop them.
People are going to be people, I guess. I bet these types of relationships can be a nightmare for human resources. 
Human resources probably deal with this alot and gets tired of having to manage those situation and polices.
Probably. I prefer black and white policies, not grey areas, since most people tend to take advantage. In my opinion, people should just get their work done and go home to start any romantic behavior.