This is a hash -> #
This is a hashtag -> #hashtag
This is not a hashtag -> # <- it’s just a hash.
I’m sick of people on TV and/or radio saying, “Send us a tweet using @someone hashtag funnysaying”. No. It’s either, “Send us a tweet using @someone hash funnysaying” or “Send us a tweet to @someone with the hashtag funnysaying”.
Hash -> #
Hashtag -> #plussomewords