[Note: This is a gift of Dhamma, not meant for commercial purpose or other wordily gaining (possible not good for those desire for becoming a Buddha and not firm in it.]
Usually/practical by avoiding to listening the Dhamma of a Buddha and taking care of not gaining wisdom or right view. So avoiding the three Juwels as good as possible, if still present in the world.
Maybe some food for benefical thought: A Bodhisttva is a member of the Sangha?
Here in Cambodia, people who have not really taken refuge into the Juwels, so if speaking about people not explicit Dhammika, are called "Buddh(a)bodhisatt(a)".
Since the root of stream-entry is right view, this has to be avoided, if one wishes to become a Buddha. If such is possible, having been touched by the good Dhamma... who knows...
Of coures it might be, that seven lives as a certain devas lasts as long as a world period. Did not made more researches in this regard.
This might be also useful for those desiring becoming a Buddha: Bodhisatta Path Answers of questions
And a nice Bodhisatta-story: The Spiritual Partner
Sotapanna (stream-enter/wisdom throw hearing) is connected with the four Noble Truth. If, when a person heard the 4NT, understanding them, not mental cognitive defect, can than, later, take on Bodhisatta-vows and avoid stream entry: my person doubts. He/she will gain the path latest with death. So possible a wasted time with a lot of pain, struggle and suffering, if having heard and understood the Dhamma, to try to avoid entry afterwards.
Some say there is a point in the Vipassana-states, where one might have gained some good insight, and where one is able to decide. A hint on it is in the 'Question and Answer' link.
It might be therefore (for a desire of becoming a Buddha), good to take on the vows before hearing the 4NT and understanding them, e.g. not taking refuge into the current Buddha, his Dhamma, his Sangha.