Make Anti Spam work on one page with several identical forms

[danielwolf1]

We have a page which contains the same form twice - thus the antispam check fails:

1. The field gets swapped two times by javascript
2. The stored session key is not valid as the second field instance replaces the session data of the first field (of the first form)

We adjusted the AntispamField by replacing all occurences of strid with a genrated unique ID. We then submit this ID in the form, to get the correct session data and it works - are there any pitfalls if we do that?

'$html .= sprintf('', $this->uniqueId);'

For example:
$sessionData = $session->get('rocksolid_antispam_' . \Input::post('rsas_uniqueid'));