Love has made us all think and do stupid things, but the level of stupidity is directly affected by our age, mental health, experience with love and number of people in our corner helping us keep a cool head.
If the lover is older and more experienced with a solid friend base they normally won't take things too far but if they're young with little to no experience with love they may work way too hard to get someone to notice them.
Factors such as loneliness, self esteem issues and depression can also affect what people are willing to do to woo the object of their affection, and these mental health factors can also make our romantic gestures seem a bit sick.
See Gestures That Prove Love Is Blind (And Also Insane) at Cracked (NSFW language)