I'm writing an article on how to write effective e-mail messages. One
of the tips I give is to use attachments sparingly, and only when it's
absolutely necessary, which I believe never is. I'm trying to come up
with a good simil to illustrate that point. So far, it's eluding me.
So my question is how would you complete the following sentence:

Receiving an e-mail with a bulky file attachment is like ...

It has to appropriately illustrate the fact that it's inconvenient and annoying

Thanks

...coming home to find a surprise birthday cake from a friend stuffed
awkwardly into your mailbox.  While it may be well-intentioned, it's
messy and inconvenient, especially when the rest of your messages get
frosting all over them.