If someone wants to take this approach then a more seamles way is to get a free account on Zoho. It gives 5 email accounts on free tier and a high number of aliases. I use of the mailboxes for random signups with almost 14 aliases and enter that anytime I have to enter my email and maintain conversations.
Why not just sign up for another different gmail account like "myrandomid@gmail.com" and then use the "+randomtext" thingy so you dont reveal your real email ID?
this assumes all websites you want to sign up at allow this +randomtext format, im sure there are smart people who will disallow this format...