Is Texting Candidates Rude? #overthinkingthis

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Probably #overthinkingthis but I generally text each candidate I am about to call so they know who is calling (or to update them if a prior call is going long).

I feel like it’s a courtesy, as it reminds them we set a time, or gives them a minute to step into a private location for a call, but would you feel getting a blind text is annoying, intrusive or even slightly rude?