Im sorry, but sometimes some trigger warnings dont need to be shown. if thats a trigger, you can tell by the warnings, that clinginess is probably in the game. im avoidant, but even i know that sometimes you need to decide on my own if i can play a game or not. not everyone is gonna think of every trigger possible. thats the harsh reality. and trust me when i say this, im not saying all that to hate, but to help you avoid your triggers in a game. stalking/ kidnapping is a sign that someone is probably clingy. (i didnt play yet, but im guessing based off the triggers shown)
Personally, wasn't a trigger for me. I'm the type of person who likes to be considerate to other people and realized during my play through that it may be necessary because the degree of clinginess was quite severe. Like you mentioned, trigger warnings help in deciding if someone can play a game. Hence, why they are important.
When you get around to playing the game yourself, you'll see the difference in severity by comparing Caleb and Penelope. Hope your gaming experience is fun! :D