Could the Mane 5 have come up with a more official excuse to keep the Crystal Ponies away from the fake Heart?

[Wardaddy 470]

In Part 2 of the Crystal Empire, the Mane 5 were desperately trying to keep the Crystal Ponies from exposing the fake heart, getting them to try out the food and drink instead. I wonder could they have come up with more convincing excuses to keep the ponies away? You know, something like "Princess Cadance has decreed that the heart remain isolated until such time as it is safe to view it." Something a little more solid than just trying to get the ponies to eat and drink.

[Pr0m4NV14 837]

Mane 5.

Mane 5.

Mane 5.

Mane 5.

Mane 5.

Mane 5.

[cmarston1 5,952]

I mean they could have, but the events that were taking place during that two parter placed the cast in a lot of pressure, so I can understand why they didn't.