Subscribing to calendars is an interesting option for many users, especially when some type of sporting event is held, such as the Europe (to give an example that we have recently talked about in Actualidad iPhone). However, it is also a problem for users who they do not have extensive knowledge.
Spam within the iCloud calendar is a problem that Apple takes dragging since 2016, despite the large number of changes and improvements that Apple has implemented in this service. Unfortunately for Apple, none of the changes that it has made have been used for anything, due, in part, to the ignorance of some users.
In the United States, where the iPhone share is more than 50%, there are many malicious users who are dedicated to sending calendar invitations to emails at random. If the recipient declines the invitation, sender knows account is active, so he focuses his efforts on this account, continually sending new invitations.
In addition, calendar spam can also be distributed through web pages, web pages that invite you to subscribe to the calendar if you want to access the content it shows. This week, a new thread on Reddit, which has already garnered more than 5.000 upvotes, asks Apple to add additional protections to fight pop-up windows.
In the first case, Apple could allow block sender address (as long as you use the same address). In the second case, Apple should implement an intermediate step that allows these web pages to be deceived, since can't fight user ignorance nor the user's desire to access the information that this web page claims to offer.
