I very rarely answer random call for the same reason you don't answer them and that is because I expect it to be a sales call of some sort.
Also, be careful on Discord, I noticed that there are carefully crafted profiles that imitate people I know on Discord. For example take a look at my direct messages, the message I blocked is from a copy cat profile that was basically identical to the original with almost invisible variation in name and it was created after the real one:
Yeah, I am pretty careful on Discord for the most part. The scam might actually be less now! :D