Well, yes you could be targeted easily with more spam.
Just a bit technical for now, if you want to get same email address and lightning address then you need at least to:
1. Host your own email address server (not using email provider)
2. Host your own Lightning Node, and lightning address server
3. Have your own domain
Unless in the future, popular provider like Gmail, Protonmail, Tutanota also gives us Lightning address as Wallet services š