Currently the Twitter Block settings ask for username to use for fallback link in case of no JS. However, the actual implementation (simply appending the content of username field to "https://twitter.com/") makes it possible to use hashtags just as well (Twitter redirects https://twitter.com/#drupal to https://twitter.com/hashtag/drupal).
It is possible to use as-is, but doing so will confuse the semantics of the database and create potential future incompatibilities.
The username field should be renamed to something more generic, like "Twitter target". This would mean a fairly straightforward task of renaming the table field and all references to it, and changing the help text, and rephrasing the fallback link text to fit both usernames and hashtags or inserting logic to select phrasing dependent on the first character (@ or #).
Another option would be to support both types separately, but the advantages of such approach should be made evident because it involves making both code and UI more complicated.
Patch needed to rename field, change block settings, rewrite link text. Testing.
Minor changes to block settings, small text change in front end.
None.
Closed: outdated
3.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
If this is still relevant wonder if we can get an update.
If still a valid feature request please reopen.
Twitter is going through a number of changes so believe this feature is no longer needed.