He often has to be more cautious about protecting his loved ones. In many fanfictions, he sets up security systems around his family's homes and tries to keep a low profile when he's not in the suit.
In some fanfictions, Peter Parker's identity reveal leads to his friends and family having to go into hiding for their safety. It adds a new layer of drama as they are constantly on the run from villains who now know who Spider - Man really is.
The Avengers would need to change their security measures. Since Spider - Man's identity is revealed, his enemies could use that information to target the Avengers' base. So they might have to beef up their defenses and be more vigilant.
Perhaps in a fanfiction, Spider - Man reveals his identity to Aunt May in a moment of desperation. He's been keeping it from her for so long, but when he's severely injured and she finds him in his suit, he has no choice but to tell her. This then changes their relationship dynamic as she now has to deal with the knowledge that her nephew is a superhero and all the danger that comes with it.
The element of surprise. For example, if Peter's identity is revealed in an unexpected way, like during a normal school event instead of a fight. It catches the readers off - guard.
His best friend could be the one. Since they are close, they might notice some strange behavior or coincidences that lead them to suspect Peter is Spider - Man. For instance, Peter always disappearing at the same time Spider - Man shows up.
Definitely Aunt May. Her reaction to Peter's big reveal would be full of emotions like shock, worry, but also pride. Another great character is J. Jonah Jameson. His reaction would be explosive and probably involve him trying to get an exclusive interview or using the information for his own gain. And of course, Ned. His friendship with Peter would add a lot of heartwarming and comical moments to the story.
In Spectacular Spider - Man fanfiction, the identity crisis can be a really interesting concept. Peter Parker has to constantly balance his normal life and his superhero identity. In some fanfictions, this is taken to new extremes. Maybe he's faced with a situation where his identity is exposed to more people than just the bad guys, like his friends or family. This can lead to a whole new set of problems and challenges for him to overcome.
Perhaps Doctor Octopus. Knowing who Spider - Man really is, he might use his intelligence and his mechanical arms to create elaborate traps for Peter Parker at his home or workplace. He could also try to expose Spider - Man's secrets further to the public and turn the public against him.